func getNumericalValue()

in extra/aws-sdk-go/internal/ini/value_util.go [77:150]

• 63 lines of code
• 25 McCabe index (conditional complexity)

func getNumericalValue(b []rune) (int, int, error) {
	if !isDigit(b[0]) {
		return 0, 0, NewParseError("invalid digit value")
	}

	i := 0
	helper := numberHelper{}

loop:
	for negativeIndex := 0; i < len(b); i++ {
		negativeIndex++

		if !isDigit(b[i]) {
			switch b[i] {
			case '-':
				if helper.IsNegative() || negativeIndex != 1 {
					return 0, 0, NewParseError("parse error '-'")
				}

				n := getNegativeNumber(b[i:])
				i += (n - 1)
				helper.Determine(b[i])
				continue
			case '.':
				if err := helper.Determine(b[i]); err != nil {
					return 0, 0, err
				}
			case 'e', 'E':
				if err := helper.Determine(b[i]); err != nil {
					return 0, 0, err
				}

				negativeIndex = 0
			case 'b':
				if helper.numberFormat == hex {
					break
				}
				fallthrough
			case 'o', 'x':
				if i == 0 && b[i] != '0' {
					return 0, 0, NewParseError("incorrect base format, expected leading '0'")
				}

				if i != 1 {
					return 0, 0, NewParseError(fmt.Sprintf("incorrect base format found %s at %d index", string(b[i]), i))
				}

				if err := helper.Determine(b[i]); err != nil {
					return 0, 0, err
				}
			default:
				if isWhitespace(b[i]) {
					break loop
				}

				if isNewline(b[i:]) {
					break loop
				}

				if !(helper.numberFormat == hex && isHexByte(b[i])) {
					if i+2 < len(b) && !isNewline(b[i:i+2]) {
						return 0, 0, NewParseError("invalid numerical character")
					} else if !isNewline([]rune{b[i]}) {
						return 0, 0, NewParseError("invalid numerical character")
					}

					break loop
				}
			}
		}
	}

	return helper.Base(), i, nil
}